flappybird.cpp

#include<iostream>
#include<conio.h>
#include<dos.h>
#include<stdlib.h>
#include<string.h>
#include <windows.h>
#include <time.h>

#define SCREEN_WIDTH 90
#define SCREEN_HEIGHT 26
#define WIN_WIDTH 70
#define MENU_WIDTH 20
#define GAP_SIZE 7
#define PIPE_DIF 45

using namespace std;
//		cout<<"±±±±±±±±±";
 
HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE);
COORD CursorPosition;

int pipePos[3];
int gapPos[3];
int pipeFlag[3];
char bird[2][6] = { '/','-','-','o','\\',' ',
					'|','_','_','_',' ','>' };
int birdPos = 6;
int score = 0;

void gotoxy(int x, int y)
{
	CursorPosition.X = x;
	CursorPosition.Y = y;
	SetConsoleCursorPosition(console, CursorPosition);
}

void setcursor(bool visible, DWORD size) 
{
	if(size == 0)
		size = 20;	
	
	CONSOLE_CURSOR_INFO lpCursor;	
	lpCursor.bVisible = visible;
	lpCursor.dwSize = size;
	SetConsoleCursorInfo(console,&lpCursor);
}

void drawBorder(){ 
	
	for(int i=0; i<SCREEN_WIDTH; i++){
		gotoxy(i,0); cout<<"±";
		gotoxy(i,SCREEN_HEIGHT); cout<<"±";
	}
	
	for(int i=0; i<SCREEN_HEIGHT; i++){
		gotoxy(0,i); cout<<"±";
		gotoxy(SCREEN_WIDTH,i); cout<<"±";
	}
	for(int i=0; i<SCREEN_HEIGHT; i++){
		gotoxy(WIN_WIDTH,i); cout<<"±";
	}
}
void genPipe(int ind){
	gapPos[ind] = 3 + rand()%14; 
}
void drawPipe(int ind){
	if( pipeFlag[ind] == true ){
		for(int i=0; i<gapPos[ind]; i++){ 
			gotoxy(WIN_WIDTH-pipePos[ind],i+1); cout<<"***"; 
		}
		for(int i=gapPos[ind]+GAP_SIZE; i<SCREEN_HEIGHT-1; i++){ 
			gotoxy(WIN_WIDTH-pipePos[ind],i+1); cout<<"***"; 
		}
	} 
}
void erasePipe(int ind){
	if( pipeFlag[ind] == true ){
		for(int i=0; i<gapPos[ind]; i++){ 
			gotoxy(WIN_WIDTH-pipePos[ind],i+1); cout<<"   "; 
		}
		for(int i=gapPos[ind]+GAP_SIZE; i<SCREEN_HEIGHT-1; i++){ 
			gotoxy(WIN_WIDTH-pipePos[ind],i+1); cout<<"   "; 
		}
	}
}

void drawBird(){
	for(int i=0; i<2; i++){
		for(int j=0; j<6; j++){
			gotoxy(j+2,i+birdPos); cout<<bird[i][j];
		}
	}
}
void eraseBird(){
	for(int i=0; i<2; i++){
		for(int j=0; j<6; j++){
			gotoxy(j+2,i+birdPos); cout<<" ";
		}
	}
}

int collision(){
	if( pipePos[0] >= 61  ){
		if( birdPos<gapPos[0] || birdPos >gapPos[0]+GAP_SIZE ){
//			cout<< " HIT ";
//			getch();
			return 1;
		}
	}
	return 0;
}
void debug(){
//	gotoxy(SCREEN_WIDTH + 3, 4); cout<<"Pipe Pos: "<<pipePos[0];
	
}
void gameover(){
	system("cls");
	cout<<endl;
	cout<<"\t\t--------------------------"<<endl;
	cout<<"\t\t-------- Game Over -------"<<endl;
	cout<<"\t\t--------------------------"<<endl<<endl;
	cout<<"\t\tPress any key to go back to menu.";
	getch();
}
void updateScore(){
	gotoxy(WIN_WIDTH + 7, 5);cout<<"Score: "<<score<<endl;
}

void instructions(){
	
	system("cls");
	cout<<"Instructions";
	cout<<"\n----------------";
	cout<<"\n Press spacebar to make bird fly";
	cout<<"\n\nPress any key to go back to menu";
	getch();
}

void play(){
	
	birdPos = 6;
	score = 0;
	pipeFlag[0] = 1; 
	pipeFlag[1] = 0;
	pipePos[0] = pipePos[1] = 4;
	
	system("cls"); 
	drawBorder();
	genPipe(0);
	updateScore();
	
	gotoxy(WIN_WIDTH + 5, 2);cout<<"FLAPPY BIRD";
	gotoxy(WIN_WIDTH + 6, 4);cout<<"----------";
	gotoxy(WIN_WIDTH + 6, 6);cout<<"----------";
	gotoxy(WIN_WIDTH + 7, 12);cout<<"Control ";
	gotoxy(WIN_WIDTH + 7, 13);cout<<"-------- ";
	gotoxy(WIN_WIDTH + 2, 14);cout<<" Spacebar = jump";
	
	gotoxy(10, 5);cout<<"Press any key to start";
	getch();
	gotoxy(10, 5);cout<<"                      ";
	
	while(1){
		 
		if(kbhit()){
			char ch = getch();
			if(ch==32){
				if( birdPos > 3 )
					birdPos-=3;
			} 
			if(ch==27){
				break;
			}
		}
		
		drawBird();
		drawPipe(0);
		drawPipe(1);
		debug();
		if( collision() == 1 ){
			gameover();
			return;
		}
		Sleep(100);
		eraseBird();
		erasePipe(0);
		erasePipe(1);
		birdPos += 1;
		
		if( birdPos > SCREEN_HEIGHT - 2 ){
			gameover();
			return;
		}
		
		if( pipeFlag[0] == 1 )
			pipePos[0] += 2;
		
		if( pipeFlag[1] == 1 )
			pipePos[1] += 2;
		
		if( pipePos[0] >= 40 && pipePos[0] < 42 ){
			pipeFlag[1] = 1;
			pipePos[1] = 4;
			genPipe(1);
		}
		if( pipePos[0] > 68 ){
			score++;
			updateScore();
			pipeFlag[1] = 0;
			pipePos[0] = pipePos[1];
			gapPos[0] = gapPos[1];
		}
		
	}
	 
}

int main()
{
	setcursor(0,0); 
	srand( (unsigned)time(NULL)); 
	
//	play();
	
	do{
		system("cls");
		gotoxy(10,5); cout<<" -------------------------- "; 
		gotoxy(10,6); cout<<" |      Flappy Bird       | "; 
		gotoxy(10,7); cout<<" --------------------------";
		gotoxy(10,9); cout<<"1. Start Game";
		gotoxy(10,10); cout<<"2. Instructions";	 
		gotoxy(10,11); cout<<"3. Quit";
		gotoxy(10,13); cout<<"Select option: ";
		char op = getche();
		
		if( op=='1') play();
		else if( op=='2') instructions();
		else if( op=='3') exit(0);
		
	}while(1);
	
	return 0;
}